Search results for "Rhenium"
showing 10 items of 244 documents
Electrolytic preparation of actinide filaments for laser resonance ionization spectroscopy
1993
Abstract For the determination of trace amounts of actinide elements by resonance ionization mass spectroscopy, atomic beams of these elements are produced by evaporation from rhenium substrates. The actinides are deposited by electrolysis as hydroxides in a 2 mm spot on a rhenium foil and covered electrolytically with a thin layer of rhenium or platinum. During heating of such a sandwich reduction occurs to the metallic state while diffusing through the overplated layers and the actinides are evaporated as atoms from the surface. With lead-doped platinum, efficient release is observed already at 1700°C in contrast to rhenium where 2100°C is required and a higher background is produced.
Gamma bands in doubly odd rhenium and iridium nuclei
2015
Structure of the |K ± 2| bands in doubly-odd nuclei belonging to the transitional deformation region at A∼190 is discussed. Relation of these quasi gamma-bands with the non-axial deformation of the parent two- quasiparticle configurations is studied. Using available experimental information, new tentative |K ± 2| bands are proposed in 188 Re, and 192,194 Ir nuclei. Coexistence of two-quasiparticle states with different deformation modes is considered in the case of 188 Re and 194 Ir.
DNA Oxidation Photoinduced by Norharmane Rhenium(I) Polypyridyl Complexes: Effect of the Bidentate N,N′-Ligands on the Damage Profile
2018
Re(I)--polypyridyl complexes have interesting and distinctive photochemical and photosensitizing properties. This work describes the capability to induce (or photoinduce) DNA damage of three Re(I)-complexes with a naturally occurring alkaloid called norharmane (nHo) as ligand: [Re(CO)₃ (nHo)(L)]CF₃ SO₃ where L=2,2'-bipyridine (ReBpy), phenanthroline (RePhen) or dipyrido[3,2-a:2',3'-c]phenazine (ReDppz). The interaction of the complexes with DNA was investigated by steady-state and time-resolved spectroscopy. Data show that the mode and strength of interaction depend on the chemical structure of the bidentate ligand. The complexes show a major static contribution to the overall interaction, …
Synthesis, properties and X-ray crystal structure of schiff base organoimido complexes of rhenium(V)
1984
Abstract Re(NR)Cl 3 (PPh 3 )( 2 (R = p-CH 3 C 6 H 4 , CH 3 ) react with polydentate ligands (LH = N-methyl-, N-phenyl-, N-tolyl-salicylideneimine, half, N,N′-ethylenebis-, half N,N′-propylenebis-(salicylideneimine), 8-hydroxyquinoline and LH 2 = N-2-hydroxyphenylsalicylideneimine) to yield complexes of the type Re(NR)Cl 2- (L)PPh 3 . With 8-hydroxyquinoline the bisubstituted Re(NR)Cl(L) 2 complexes are also obtained. The compounds were characterized by elemental analysis, molecular weight, and i.r. spectra. The crystal and molecular structures of two arylimido complexes, Re(p-CH 3 C 6 H 4 N)Cl 2 )RNCHC 6 H 4 O)PPh 3 with R = C 6 H 5 or CH 3 , were determined from X-ray crystallography base…
Discovery of the proton emitting nucleus $^{159}$Re
2007
Fund. para Cienc. Tecnol., FCT, Minist. Cienc. Tecnol.;Fundacao Calouste Gulbenkian;Fundacao Luso-Americana
CCDC 2075886: Experimental Crystal Structure Determination
2021
Related Article: M. Pacheco, N. Alvarez, A. Cuevas, A. Romerosa, F. Lloret, C. Kremer|2021|Acta Crystallogr.,Sect.E:Cryst.Commun.|77|749|doi:10.1107/S2056989021006381
CCDC 1471982: Experimental Crystal Structure Determination
2016
Related Article: Izabela Gryca, Joanna Palion-Gazda, Barbara Machura, Mateusz Penkala, Francesc Lloret and Miguel Julve|2016|Eur.J.Inorg.Chem.||5418|doi:10.1002/ejic.201601004
CCDC 1885666: Experimental Crystal Structure Determination
2019
Related Article: Carlos Rojas-Dotti, Adrián Sanchis-Perucho, Marta Orts-Arroyo, Francesc Lloret, José Martínez-Lillo|2019|Comptes Rendus Chimie|22|490|doi:10.1016/j.crci.2019.04.004
CCDC 837170: Experimental Crystal Structure Determination
2012
Related Article: J.Martinez-Lillo, D.Armentano, G.De Munno, J.Cano, F.Lloret, M.Julve, J.Faus|2011|Inorg.Chem.|50|12405|doi:10.1021/ic202088s
CCDC 783391: Experimental Crystal Structure Determination
2011
Related Article: R.Chiozzone, R.Gonzalez, C.Kremer, D.Armentano, G.De Munno, M.Julve, F.Lloret|2011|Inorg.Chim.Acta|370|394|doi:10.1016/j.ica.2011.02.013